M68HC11K_13 Datasheet, PDF (149/290 Pages) Freescale Semiconductor, Inc – M68HC11K Family Technical Data

Freescale Semiconductor, Inc.
Technical Data — M68HC11K Family
Section 7. Serial Communications Interface (SCI)
7.1 Contents
7.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
7.3 Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
7.4 Transmit Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151
7.5 Receive Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
7.6 Wakeup Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
7.7 Short Mode Idle Line Detection . . . . . . . . . . . . . . . . . . . . . . .157
7.8 Baud Rate Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
7.9 SCI Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158
7.9.1 SCI Baud Rate Control Register . . . . . . . . . . . . . . . . . . . . 158
7.9.2 Serial Communications Control Register 1 . . . . . . . . . . . . 160
7.9.3 Serial Communications Control Register 2 . . . . . . . . . . . . 161
7.9.4 Serial Communication Status Register 1 . . . . . . . . . . . . . . 162
7.9.5 Serial Communication Status Register 2 . . . . . . . . . . . . . . 164
7.9.6 Serial Communications Data Register . . . . . . . . . . . . . . . . 165
7.2 Introduction
The serial communications interface (SCI) is a universal asynchronous
receiver transmitter (UART) employing a standard non-return-to-zero
(NRZ) format. Several baud rates are available. The SCI transmitter and
receiver are independent, but they use the same data format and baud
rate.
M68HC11K Family
MOTOROLA
Serial Communications Interface (SCI)
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Technical Data
149